[damned-lies] Restored setting working dir in update-trans command

[Claude Paroz <claudep src gnome org>]

commit 80f45c8c10f5c026c8917308813348cae6c0f730
Author: Claude Paroz <claude 2xlibre net>
Date:   Fri Mar 19 08:50:22 2021 +0100

    Restored setting working dir in update-trans command

 stats/management/commands/update-trans.py | 2 ++
 1 file changed, 2 insertions(+)
---
diff --git a/stats/management/commands/update-trans.py b/stats/management/commands/update-trans.py
index 5d092b08..2f92c7d0 100644
--- a/stats/management/commands/update-trans.py
+++ b/stats/management/commands/update-trans.py
@@ -1,3 +1,4 @@
+import os
 import re
 import shutil
 import itertools
@@ -51,6 +52,7 @@ class Command(BaseCommand):
                     fh.write("_(u\"\"\"%s\"\"\")\n" % value)
 
         # Run makemessages -l ll
+        os.chdir(settings.BASE_DIR)
         call_command('makemessages', locale=[lang_code])
 
         # Delete database-content.py